Features:There are two kinds of 4*4*4 3D LED Light Squared, the one LED only display blue color, the other can display two color.1: Bi-color LED is 3 feet, single color is 2 feet !2: If you buy the only blue LED,The hole of the board "R+" dose not connect.Specifications:Service voltage: 5VPCB size: 71*73mmLED Light Color: Blue, Blue & redNet weight: Approx. 83gPackage includes:1* PCB board1* Other Accessories